Multiple paned window



.F. W. DAEMICKE MULTIPLE PANED WINDOW Filed March 13, 1936 April' 12, 1938.

Patented Apr. 12, 1.938

2,113,613 .a MULTIPLE PANED WINDOW Frank W. Daemicke, Chicago, Ill., assignor to The Daemicke Company, Chicago, Ill., a corporation of Illinois Application March 13 6 Claims.

M y invention., although applicable to use wherever double or multiple glass panels are feasible,

is especially adapted to display cases or service` counters and particularly of the refrigerated type for displaying perishable articles of food, such as meats and the like; the side and end walls involving glass panels in order that the merchandise may be properly visible, the glass panels in these display cases being preferably substantially coextensive with the upper part of the case above the food holding rack or inner bottom portion of the merchandise holding part of the case.

In display cases of the type in question the rear side of the case consists of slidably mounted lglass panels or sliding doors whereby access by the salesman to the displayed articles is possible. 'I'hese sliding doors frequently are provided with v spaced apart, parallelly arranged glass panels in order to prevent the too rapid transfer of temperature or warming up of the case interior.

In View of the dliiiculties of hazing or fogging heretofore encountered, double or multiple glass panels are not generally/ used at the front side of the case or counter because the condition encounteredinterfered with the customers' visibility and hence single glass panels, that are accessible from both sides, have generally been employed with the result that great temperature losses have been encountered.

The object of my invention is to overcome the difficulties heretofore encountered and to provide a window construction, whether as the show winl dow of a store or as a display case of the character mentioned, involving a multiple .of glass 35 panes or panels arranged in spaced relation and each vpanel thoroughly sealed inthe window frame or main frame portion of the display case against ingress of air and moisture and an hermetically j sealed a'ir chamber or chambers between the glass 40 panels provided, thereby eliminating all possibility of condensation and the formation of a haze or fog on the glass; the spaced glass panels with intervening hermetically sealed spaces maintaining the desired temperature` in the windowed com- 45 partment or display case interior and preventingv condensation on the inner and opposing sides of the respective glass'panels.

'I'he objects and advantages of my invention i will be more readily understood from the detailed 50 description of the accompanying drawing which,

for purposes of e'xemplication, show'the invention applied to a well known type of display case, wherein:

Figure 1 is a perspective sectional view vof a 55 display case involving my invention.

Figure 2 is a cross sectional view taken substantially on-the line 2--2 of Figure 1.

Figure 3 is a cross-sectional view taken on [the line 3-3 of Figure `2.

6o Figure 4 is an enlarged perspective view of a ,'1936, Serial No. 68;(595

(Cl. .Z0-56.5)

section of the spacer stripsemployed in Figures 1 and 2.

Figure 5 is a similar view showing a modified form of spacer strip.

My invention, which relatesto a multiple paned window regardless of the nature, of the window containing structure, is especially adapted to refrigerated display cases-whether mechanically or otherwise refrigeratedof the type intended for displaying meats and other perishable foodstuffs, and in order to illustrate the invention and its method of construction, its application to a well known type of display counter is disclosed in the drawing, wherein a portion of a slidable door at the rear or salesmans side of the display case is shown at l0 in Figure l; these slidable doors or panels being mounted so that one panel or section will lap 1the other when slid out of normal or closed position.

The invention and its application is more easily disclosed in connection with the forward side of the caseand the description will, therefore, be conned to this part of the case.

In order to prevent the conduction of the warmer or room temperature and to maintain the desired low temperature within the display case, a plurality of spaced apart 4glass panels Il, for illustration three in number, are provided on -the`forward or customers side of the display case as shown in\Figure 1. These glass panels are spaced suiiicient distances apart and preferably in parallel relation as shown to provide intervening hermetically sealed air insulating spaces therebetween to prevent the transfer of the Warmer exterior temperature to the case interior.

In order to permit the use of a plurality of lglass panels as mentioned it is essential that the respective panels be hermetically sealed in the frame against ingress of air and moisture; the use and proper installation of multiple glass panels enabling a low temperature to be maintained Without producing condensation on the inner sides of the glass panels.

-In the particular exemplication of display case, top sections] 2, I2 are shown preferably with suitable insulation I3 therebetween, while the forwardside of the case is provided with the rectangular frame Il snugly joined to the top, side and front walls of thecase. i

The frame is preferably chamfered on the inner perimeter as shown at I5 to receive the inner glass receiving frame members |.6 which are also suitably grooved or chamfered as shown at il; the chamfer extending to the outer edge of the frame members I6 at one side, while the side wall at the other side of the chamfer is preferably slightly undercut or beveled as shown at I8 in Figure 2. It will be understood that the frame members I6 extend about the four sides of the opening inv the structure or case. and 'that the the four marginal edges of therectangular glass panels may extend somewhat into the respective chamfers as more clearly shown in Figure 2.

The frame members in the illustration are of width suilicient to properly receive a plurality of spaced glass panels I I, for example three in number as shown; the glass panels being preferably equally spaced apart and the intermediate panel maintained in spaced relation with the two side panels II by means of the spacing strips I9, I9. which extend throughout the length of the chamvfers and along the four marginal edges of the glass. 4

These spacing strips are kerfed along the opposite longitudinal sides to receive a longitudinal marginal portion of the rubber strips 2li, 20, which extend continuously throughout the length of the strips I9 and are preferably glued or otherwise;

firmly secured in thekerfs.

The kerfs with the inserted rubber strips are preferably arranged a slight distance removed from the ilat face sides of the strips I9, see Figure 2. This face side of the spacing strips is preferably covered with a strip of channel shaped sheet metal as at 2|;the rubber strips, however, extend somewhat beyond the plane of the sides of the metal channel 2l l The two longitudinal sides of the spacing strips between the kerfs and the base sides 22 of the strips are inwardly tapered or slopedas shown at 23 to provide recesses; while the base portions of the strips are laterally extended as shown at 24, 24; these base portions or fla'nges being made to extend somewhat beyond the plane ofthe kerfed sides of the strips, as more clearly shown in Figure 4.

' 'I'hese extended base portions 24, 24 are intended to lap and reston the edges of the glass panels asl shown in Figures 1 and 2, while the rubber strips 20, 2 Il are intended-to be in snug relation with the sides of the glass panels. It is` apparent that during assembly of the structure the spacer strips I9 will be held in positionin the channel of the frame member by the glass panels and hence displacement of the spacer strips 'is impossible.

The glass contacting faces of the base portions or flanges 24, 24 are undulated or serrated as shown at 25 in Figure 4 in order to permit the sealing compoundI shown at 26 to iiow from the to the grooved frame main portion of the chamfer I1 into the recesses between the'tapered sides of the spacing strips and the sides of the glass panels,

'I'he iiow of the sealing compound out of the recesses mentioned is prevented by the rubber strips 20; the snug relation 'between the rubber strips 2li and the sides of the glass panel preventing the seepage of the compound along the sides of the glass beyond the spacing strips.

In order also to maintain the spacing strips I9 in spaced relation with the bottom of the chamfer I1 in the frame'and to enable the sealing compound to iiow from side to side of the chamfer and completely around the three-sides of the spacing strips I9, I prefer to provide the bottom of the chamfer or groove I1 with narrow strips 21 disposed transversely of the spacing strips I9; the strips 21' being Preferablysecured les than the width of the chamfer so as to allow flow of the sealing compound about the ends of the strips 21. y

member I6 and'of length v preferably what.

may be introduced through the open -side of chamfer I1 after the glass panels and spacing strips have been put into place; the side wall I8 of the chamfer having been previously provided with a sealing or rubber strip as at 28, see Figure 2, adapted to provide snug relation with the side of the adjacent glass panel and prevent'seepage of the sealing compound on the inside face of the inner glass panel. As previously stated, asphalt is preferably used as the juncture providing or sealing compound, although any other solidifying and yet elastic compound may be employed, namely a compound which may liquefy sumciently to be poured into the chamfer and which will seep through the serrations into 'the recesses vbetween the spacing strips and the glass and 'compound applied to the glass holding portion of the frame members before the window or display case is assembled, thus enabling the chamfers in the frame members to be so positioned that the compound may be poured and caused to flow toward the closed side of the chamfer and about the glass panels and spacing strips as heretofore mentioned. *l

After a sufcient quantity o! the sealing compound has been introduced and partially set, the open side or end of the chamfer I1 is Vthen provided with the finish strip 29, which may be lheld in place by suitable screws as at 30 in Figure 2; the nnish strip 29 being put into place after the compound has been poured and has partially set,

thus allowing for slight shrinkage or contraction in the compound; a slight amount being added if shrinkage or contraction beyond a certain degree has taken place.

In Figure I illustrate a slight modiilcation of spacing element or strip 3l,l which in general crosssectional configuration is similar to the spacing strip I9; strip 3| differing in that, instead of having the longitudinal kerfs for reception of the rubber strips 2li,l the rubber strips 32 are glued or otherwise securely fastened along the longitudinal sides of the spacing strips 3| as shown'so as to make a snug, sealing contact with the sides of the glass panels and thus prevent egress of thesealing compound while the latter is in a more or less fluid state during assembly. l

The spacing strip 3l, like the spacing strips I9, require no screws or nails to hold them in place, and hence there are no holes or crevices in the strips, l lap the edges of the glass panels -and are thereby held in place as well as by the sealing compound afterthe latter'has been poured and solidified;

warping of the spacing strips or pulling awayv from the sealing compound or out of contact with the glass being impossibla The. spacing strip v,with an outer metalliccovering like that shown at 2i in Figure '4, or the entire spacing strips may be made of metal instead o! wood. as shown, as may the frame members I6.

because the lateral base extensions- Il may also be provided" With the crevices and recesses` about the edges` 75 A of the glass panels and the spacing strips coma'plurality of glass panels whose marginal edges pletely lled with theplastic or elastic sealing compound it is apparent thata low temperature in the display' casev can be readily maintained in view of the non-conducting sealed chambers or .spaces between the inner and outer glass panels the type of display case herein defined and as shown vin the drawing, it is apparent that the improvement is equally adapted for use in connection with any type of windowed compartment or chamber Where visibility-or admisison of light is desirable and I, therefore, do not wish to be understood as limiting myself to the exact type and style of construction disclosed. but rather to theV invention as defined in the appended claims.

gnal edges extending into said. channel on the inner perimeter of the frame; spacing strips in'.

termediate of the glass panels'adapted to hold the latter in spaced relation. the longitudinal sides of the strips being recessed away from the panels while the outer llongitudinal edges -of the strips are' adapted vto contact the sidesof the glass panels, .the inner or base portions of. the strips being laterally extended to overlap the edges of the glass panels, said extended portions being providedwith transverse valleys or kerfs for establishing communication between the recesses at the sides of the strips and the channel in the frame; a solidifying plastic compound in the channel and a finish strip for closing the open side of the channel.'

2. A multi-paned window of the character described comprising a' window frame formed to provide a continuouschannel about the inner perimeter of the frame; a plurality of spaced apart glass panels arranged in the frame with their edgesextending into the channel without contacting thebottom of the channel; spacing strips arranged in the channel intermediate of the 'glass panels and having base portions which overlap theVl edges of the panels vand thereby effect vsupporting relation with the glass panelsf said base portions being provided with interrupted glass contacting surfaces, while the' sides of the str-ipshave sealing'compound receiving recesses communicating with the channel about j surfaces; yielding meansadjacent theouter edges of the spacing strips and adapted to engage the V air and moisture. r

nali. A multi-paned window of the character de.

the edges of the panels across said interrupted `sides of the' panelswhereby iiow of the sealing compound outof the channel and the recesses is prevented;` means for holding .said spacing strips in spaced relation with the bottom of the channel; and aplastic sealing compound nllixg Ysaid channel Iand thev recesses-whereby the glass panels are hermetically sealed against ingress oi.'

scribeccxoxnprising a frame formed to provide a -continuous channel. about the inner perinicter.'-

extend into said channel without seating in the bottom of the channel; spacing means arranged.

in said channel intermediate of adjacent glass panels and provided with laterally extended base portions adapted to overlap the edges of the glass panels and to be thereby held in place, the extended base portions and sides of said spacing means having connecting" recesses arranged in communication with said channel; the channel in the frame and said recesses being filled with a.

plastic air drying sealingcompound; and resilient sealing means disposed intermediate of said spacing means and the sides of the' glass panels and intermediate of the side wall of the channel and the adjacent glass panel for preventing outflow of the sealingy compound.

4. A multi-paned window of the character described comprising a frame formed to provide a continuous channel on itsinner perimeter open at one side; a plurality of glass panels with their marginal edges extending into said channel; means for holding the glass panels in spaced relationv with each other and arranged in said channel so 'as to provide spaces in the channel about said means, said means being adapted 'to effect sealing relation with the sides of the glass panels adjacent the .outer faces of said means while providing sealing .compound receiving spaces about the. edges and marginal sides of the panels; a plastic sealing compound in said spaces .provided by said first mentioned means and a closure strip for the open side of. said channel.

5. A multi-panedwindow of the character de- "scribed comprising a frame adapted to extend continuously about a sight-opening and `having acontinuous channel about said opening; la plurality of glass panels for said opening with the marginal edges of each panel extending into said channel; spacing elements disposed intermediate of the glass panels to hold the latter in spaced relation, both longitudinal sides of each element being-tapered toward the base while the sides adjacent "the outer. faces of each element are' adapted to lap the sides of the glass panels, the base of each element being extended laterally beyond' opposite sides andsaid extensions to over-I lap the edges of adjacent glass panels. said Alaterally extended base portions being formed to establish communication between the recesses at the tapered sides of the spacing elements and the channel in the frame; and a solidifying sealing compound in said channel about the bases of the spacing elements and about the tapered sides of said elements whereby ingress of air and moisture between the glass panels is prevented.

6. A multi-paned window of the character described comprising a frame formed to provide a -continuous channel on its inner perimeter and open on one side; a' plurality of glass panels with their marginal edges extending into `said channel; means for lholding the glass panels in spaced relation with each other. -said means having holding relation with the sides and the edges of the panels and vbeing arranged in spaced relation with `the bottom of the channelto provide a'. communicating passage through .the channel'beneath said means and. about the side edges, of

-the panels; a plastic sealing compound in-said communicating passage; means whereby flow of saidcompound'. along the sides-ofthe glass panels is prevented; and means for closing said open I 

